Tough metal requires tough cleaning. Supercharge your media’s scrubbing power with Tumbler Media Additive! Will not harm ANY METAL or Primer and will not stress brass. No Ammonia. No Buildup. Flitz Tumbler Media Additive is suitable for corn cob, walnut or other media. Cuts tumbling time in half and cleans, polishes, and protects brass & nickel. Flitz Tumbler Media Additive is an eco-safe product. Removes: Oxidation, Tarnish, Lead Buildup, and Fingerprints. Safe for: Safe when used on ANY Metal. Will not deaden primer or stress and imbrittle brass. No Ammonia. No Buildup